# CVE-2020-37207: Nsasoft SpotDialup buffer overflow in registration key field

Source: https://junglewise.ai/threats/cve-2020-37207-nsasoft-spotdialup-buffer-overflow-in-registration-key-field  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-11. Updated: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2020-37207 · Severity: high · CVSS 7.5 · Published 2026-02-11

SpotDialup, a tool used for recovering dial-up and VPN passwords, contains a flaw that allows the application to be crashed. An attacker can trigger this by entering an excessively long registration key into the software's activation field. This results in a denial-of-service, preventing legitimate users from using the application on the affected machine.

Vendors: [Nsasoft](https://junglewise.ai/threats/vendors/nsasoft).

## Quick answers

**Is CVE-2020-37207 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-37207 being exploited in the wild.

**How severe is CVE-2020-37207?** High severity, with a CVSS score of 7.5, published 11 February 2026.

**Which products and versions are affected?** Nsasoft Spotdialup 1.6.7.

**Is there a fix for CVE-2020-37207?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2020-37207 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2020-37207?** Check whether you run Nsasoft Spotdialup at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A classic buffer overflow (CWE-120) exists in SpotDialup 1.6.7 within the registration key input mechanism. The application fails to perform adequate bounds checking on the 'Key' field during the registration process. An attacker can trigger a crash by supplying a 1,000-character string, leading to a denial-of-service condition. While some metrics suggest a network vector, the exploit typically requires local interaction where a user or attacker pastes the malicious payload into the application's GUI on a Windows system. A public Proof of Concept (PoC) exists.

## Affected products

- Nsasoft (NSAuditor) SpotDialup 1.6.7

## Timeline

- 2020-01-06: disclosed: Initial exploit PoC published on Exploit-DB
- 2026-02-11: advisory: NVD publication date

## References

- [http://www.nsauditor.com/](http://www.nsauditor.com/)
- [https://www.exploit-db.com/exploits/47872](https://www.exploit-db.com/exploits/47872)
- [https://www.vulncheck.com/advisories/spotdialup-key-denial-of-service](https://www.vulncheck.com/advisories/spotdialup-key-denial-of-service)